Friction-clutch.



No. 719304. PATEN-TED JAN. 27, 1903;

0. E. ELLIGO'TT & J. B. NORRIS.

FRICTION CLUTCH. APPLIOATION FILED JUNE 19, 1902.

I0 MODEL.

[211; Z j @971 ors perf W L M iii-Mum,

rrn'

CHARLES E. ELLICOTT AND JOHN B. NORRIS, OF BALTIMORE, MARYLAND.

FRICTlQN-CLUTCH.

SPECIFiGATION forming part of Letters Patent N 0. 719,204, dated January27, 1903.

pplication filed June 19, 1902. Serial No. 112,272. (No model.)

To aZl LUhOTlZ/ it may concern: I

Be it known that we, CHARLES E. ELLICOTT and JOHN B. NORRIS, citizens ofthe United States, residing at Baltimore, in the State of Maryland, haveinvented certain new and useful Improvements in Friction -Clutches, ofwhich the following is a specification.

This invention relates to improvements in friction-clutches.

The object of the invention is to provide a device that can be readilychanged from hand to electric, steam, or other suitable power other thanhand, or vice versa, for driving a shaft from which power can betransmitted to any desirable point.

Other features of the invention will be fully set forth in thedescription of the accompanying drawings, in which Figure 1 is a frontelevation, partly in section, of a shaft and the operative parts mountedthereon. Fig. 2 is an end View of the inclined faced collar to be keyedto the shaft. Fig. 3 is an enlarged detailed view of the short secondaryshaft, showing the means of connecting the same to the main shaft. Fig.4 is a detailed view of the pawl and ratchet.

Similar numerals designate like parts throughout the several views.

In the accompanying drawings, forming part of this specification, 1designates the main shaft mounted in the bearings 2. Near one end of theshaft 1 is a collar 3, screwthreaded upon said shaft and held securelyin position by means of a pin 4, which extends through the said collarand into the shaft 1. is a ratchet-wheel 5, having a pawl 6 to preventthe backward rotation thereof. The sleeve 7 is also loosely mounted uponthe shaft 1 and is provided with a pulley S, keyed thereto at 9. Motionis transmitted from the pulley 8 by means of the belt 10 to any desiredpoint. To one end of the sleeve 7 is keyed a friction-disk 11, whichcontacts with the ratchet-wheel 5 and causes the latter to revolve whenthe sleeve 7 is forced to the right by the collar 12. The collar 12 iskeyed to the shaft 1 at 13 and impinges against the collar 14, by meansof which latter the said collar 12 is prevented from moving to the lefton the said shaft 1. The facing-surfaces of thesleeve 7 and collar 12are provided with Loosely mounted upon the shaft 1 a double incline, sothat when the shaft 1 is revolved in one direction the sleeve 7 will bemoved to the right along the said shaft, carrying with it thefriction-disk 11 and forcing the latter against the ratchet-wheel 5,which in turn is forced against the collar 3, which causes the frictionbetween the collar 12 and sleeve 7 and between the ratchet wheel 5 andfriction-disk 11 to increase to such a degree that all the said partswill revolve with the shaft 1. WVhen the shaft 1 is held stationary, thepulley S, and consequently the sleeve 7, will be prevented fromrevolving backward or in the direction opposite to that above described,as the slightest backward movement of the said pulley would cause thesleeve 7 to move to the right, owing to the inclined facing-surfaces ofthe said sleeve and collar 12, and force the friction-disk 11 againstthe ratchet-wheel 5, which latter is held by the pawl 6.

A pulley 32 is loosely mounted upon the shaft 1 and is prevented frommoving longitudinally on the said shaft by means of the collars 13 and14. This pulley 32 is driven by hand power from any suitable pointthrough the medium of the belt 15. The pulley 16 is also loosely mountedon the shaft 1,

and is driven from any desired point by elec tricity, steam, or othersuitable power other than hand through the medium of the belt 17. Thepulley 16 is formed with a hollow hub 21, which extends through thebearing 2. The pulleys 16 and 32 are each provided with inclined faces18 and 19, against which the friction-clutch is forced when it isdesired to drive either one or the other of said pulleys. Thefriction-clutch 20 is keyed to the shaft 1 at 22, but is free to move alimited distance longitudinally on the said shaft.

The outer surface of the said clutch 20 is inclined to correspond to theinclined faces 18 and 19 of the pulleys 32 and 16. This clutch 20 isprovided with a sleeve 23, integral therewith, which extends into thehollow hub 21 of the pulley 16 and is screw-threaded on the inside tomesh with the screw-threads 24 on the secondary shaft 25. A secondaryshaft 25 projects through the end of the hollow hub 21 and extends intothe sleeve 23 and has its inner end-revolubly secured to the shaft 1.This shaft 25 is held to the shaft 1 by means of a bolt 26, having itshead embedded in a recess 27 in the end of the said shaft 1 and theopposite end screwed into the end of the shaft 25. Between the head ofthe'bolt 26 and the end of the shaft 25 is a collar 28. A nut 29 isscrewed over the end of the shaft 1 and is provided with a shoulder 30,which impinges against the collar 28 and holds the latter tightlyagainst the end of the shaft 1 and prevents the head of the bolt 26 frompulling out of the recess 27. The recess 27 in the end of the shaft 1 issufficiently deep to allow the head of the bolt 26 to revolve freelytherein. On the outer end of the shaft 25 is rigidly secured a hand-wheel 31, by means of whichthe shaft 25 is turned for the purpose ofmoving the friction-clutch longitudinally on the shaft 1 and changingthe contact of the said clutch from the pulley 32 to the pulley 16, orvice versa, thereby changing the mode of operation of the shaft 1.

When it is desired to work the device as a hand-power machine, the wheel31 is turned until the friction-clutch 20 is forced against the pulley32, to which motion is transmitted from any suitable hand-driven devicethrough the medium of the belt 15. As the pulley 32 revolves, being incontact with the clutch 20, it will carry the said clutch with it, whichlatter being keyed to the shaft 1 causes the latter to revolve. As theshaft 1 revolves, the collar 12, being keyed to the shaft 1, forces thesleeve 7 to the right on the shaft 1 and causes the friction-disk 11 tocontact with the ratchet-wheel 5, which latter is forced against thecollar 3. At this point the friction of the parts is so great that thesleeve 7 and consequently the pulley 8 are caused to revolve with theshaft 1. The pulley 8, being keyed to the sleeve '7, will revolve withthe latter and transmit motion to any desired point through the mediumof the belt 10. When it is desired to work the device by steam,electricity, or other power, except by hand, the wheel 31 is turned inthe opposite direction until the friction-clutch 20 contacts with thepulley 16, to which motion is transmitted from any suitable power,excepthand,through the medium of the belt 17. The result of driving thispulley 16 will be identical with that described for the pulley 32.

When it is desired to reverse the pulley 8- say for the purpose oflowering a load which has been raisedthe shaft 1 is reversed, and as thecollar 12 re'volves the action of the inclined facing-surfaces of thesaid collar 12 and sleeve 7 will allow the latter to move along theshaft 1 to the left sufficiently to release the friction-disk 11 fromcontact with the ratchet-wheel 5 and permit the sleeve 7, andconsequently the pulley 8, to revolve with the shaft 1. Should the saidpulley 8 and sleeve 7 attempt to revolve faster than the shaft 1, thiswill be prevent-ed by the action of the inclined faces of the saidsleeve 7 and collar 12. The backward motion of the sleeve, if

traveling faster than the shaft 1, would cause the inclined face of thesleeve to ride up on the highest part of the inclined face of the collar12and force the sleeve to the right and cause the friction-disk 11 tocontact with the ratchet-wheel 5, and as the latter is held by the pawl6 the said sleeve and pulley would be held and prevented from travelingfaster than the shaft 1.

It is obvious that gear-wheels may be substituted for the pulleys hereinshown and described.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. The combination of the main shaft having two pulleys loosely mountedthereon, one of said pulleys having an integral hollow hub; afriction-clutch keyed to said shaft and having an integral sleeveprojecting into the said hollow hub and screw-threaded on the innersurface; a secondary shaft secured to, and revoluble independent of, themain shaft and being screw-threaded to mesh with the threads on theintegral sleeve; and a wheel keyed to the secondary shaft for revolvingthe latter, whereby the said clutch is thrown in or'out of engagementwith either of the said pulleys.

2. The combination with the main shaft having two pulleys looselymounted thereon, one of said pulleys having an integral hollow hub; afriction-clutch keyed to said shaft and having an integral sleeveprojecting into the said hollow hub; a secondary shaft secured to, andrevoluble independent of, the main shaft and being screw-threaded tomesh with the threads on the integral sleeve; a bolt screwed into theend of the secondary shaft and having its head embedded in the end ofthe main shaft; a collar fitted on said bolt between the end of thesecondary shaft and the head of the bolt; a nut screw-threaded upon theend of the main shaft and having a shoulder impinging against the saidcollar; and a wheel on the outer end of the secondary shaft to turn thelatter for the purpose of throwing the friction-clutch in or out ofengagement with the pulleys on the main shaft.

3. The combination of the main shaft having two pulleys loosely mountedthereon, one of said pulleys having an integral hollow hub; afriction-clutch keyed to said shaft and having an integral sleeveprojecting into the said hollow hub and screw-threaded on the innersurface; a secondary shaft secured to, and revoluble independent of, themain shaft and being screw-threaded to mesh with the threads on theintegral sleeve; a wheel keyed to the secondary shaft for revolving thelatter, whereby the said clutch is thrown in or out of engagement witheither of the said pulleys; a ratchet-wheel loosely mounted on the mainshaft; means on said shaft to limit the movement of the saidratchet-wheel in one direction; a sleeve loosely mounted on said mainshaft and having a friction-disk at one end and the opposite end havingan inclined face; pulley keyed thereto, to revolve with the main apulley keyed to said sleeve; a collar keyecl shaft. to said main shaftand having an inclined In testimony whereof we affix oursignafacing-surface, wherehy when the said shaft tnres in the presenceof two witnesses. 5 is revolved the inclined facing-surfaces of the saidcollar and sleeve will cause the latter to ggg g g' gi move to the rightcausing the friction-disk to contact with the ratchetwvheel until thefric- Witnesses: tion of the parts increases to such a degree as GHAPINA. FERGUSON,

10 to .cause the sleeve, and consequently the HERMAN NEWNAN.

